Sergio:
Hi! Nice question!
They have different ways to talk to their families, not only they can chat and send emails, but they can also talk with them with a telephone and even have a video-conference using the webcams they have on the laptops!
They can do that whenever they want, but obviously they also have to work. But for sure they make a phone call at least once a day.
I once got a phone call from an astronaut when I was at work, I have to say that receiving a phone call from space is quite striking! 😀
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